9
INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes and the NEC (National Electri-
cal Code) ANSI/NFPA 70 for special installation
requirements.
2. Determine unit location (from project plans) or select unit
location.
3. Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (pad, rails or
other) that provides for the minimum clearances required for safe-
ty. This includes the clearance to combustible surfaces, unit per-
formance and service access below, around and above unit as
specified in unit drawings. See Fig. 5.
Select a unit mounting system that provides adequate height to
allow for removal and disposal of frost and ice that will form
during the heating-defrost mode.
NOTE: Consider also the effect of adjacent units on airflow per-
formance and control box safety clearance.
Do not install the outdoor unit in an area where fresh air supply to
the outdoor coil may be restricted or when recirculation from the
condenser fan discharge is possible. Do not locate the unit in a
well or next to high walls.
Evaluate the path and required line length for interconnecting re-
frigeration piping, including suction riser requirements (outdoor
unit above indoor unit), liquid line lift (outdoor unit below indoor
unit) and hot gas bypass line. Relocate sections to minimize the
length of interconnecting tubing.
Although unit is weatherproof, avoid locations that permit water
from higher level runoff and overhangs to fall onto the unit.
Fig. 5 — Service Clearance Dimensional Drawing
Step 2 — Complete Pre-Installation Checks
CHECK UNIT ELECTRIC CHARACTERISTIC
Confirm before installation of unit that voltage, amperage and cir-
cuit protection requirements listed on unit data plate agree with
power supply provided.
UN-CRATE UNIT
Remove unit packaging except for the top skid assembly, which
should be left in place until after the unit is rigged into its final
location.
INSPECT SHIPMENT
File a claim with shipping company if the shipment is damaged or
incomplete.
CONSIDER SYSTEM REQUIREMENTS
• Consult local building codes and National Electrical Code
(NEC, U.S.A.) for special installation requirements.
• Allow sufficient space for airflow clearance, wiring, re-
frigerant piping, and servicing unit. See Fig. 1 and 2for
unit dimensions and weight distribution data.
• Locate the unit so that the outdoor coil (condenser) airflow
is unrestricted on all sides and above.
• The unit may be mounted on a level pad directly on the
base channels or mounted on raised pads at support points.
See Tables 2 and 3for unit operating weights. See Fig. 1
and 2for weight distribution based on recommended sup-
port points.
NOTE: If vibration isolators are required for a particular installa-
tion, use the data in Fig. 1and 2to make the proper selection.
Step 3 — Prepare Unit Mounting Support
SLAB MOUNT
Provide a level concrete slab that extends a minimum of 6 in.
(150 mm) beyond unit cabinet. Install a gravel apron in front of
condenser coil air inlet to prevent grass and foliage from obstruct-
ing airflow.
Step 4 — Rig and Mount the Unit
RIGGING
These units are designed for overhead rigging. Refer to the rigging
label for preferred rigging method. Spreader bars are not required
if top crating is left on the unit. All panels must be in place when
rigging. As further protection for coil faces, plywood sheets may
be placed against the sides of the unit, behind cables. Run cables
to a central suspension point so that the angle from the horizontal
is not less than 45 degrees. Raise and set the unit down carefully.
If it is necessary to roll the unit into position, mount the unit on
longitudinal rails, using a minimum of 3 rollers. Apply force to the
rails, not the unit. If the unit is to be skidded into position, place it
on a large pad and drag it by the pad. Do not apply any force to the
unit.
Raise from above to lift the unit from the rails or pad when unit is
in its final position.
After the unit is in position, remove all shipping materials and top
crating.
Step 5 — Complete Refrigerant Piping
Connections
Refrigerant lines must be carefully designed and constructed to
ensure equipment reliability and efficiency. Line length, pressure
drop, compressor oil return, and vertical separation are several of
the design criteria that must be evaluated. See Table 4.
IMPORTANT: DO NOT BURY REFRIGERATION LINES.
LEFT:
Min 18" (457 mm)
required for service
RIGHT:
Min 18" (457 mm)
required for service
REAR:
Min 18" (457 mm)
required for service
NOTE: Observe requirements for 39" (914 mm) operating clearance
on either Left or Rear coil opening.
FRONT:
42" (1067 mm)
required for service
IMPORTANT: Do not bury refrigerant piping underground.
IMPORTANT: A refrigerant receiver is not provided with
the unit. Do not install a receiver.
